Daxun Alloy's Pure Titanium Grade 1 Tubes Include:
Seamless and welded titanium tubes, renowned for their exceptional ductility and cold formability, are perfect for deep drawing applications. Grade 1 titanium tubes offer remarkable general and seawater corrosion resistance, with superior resistance to oxidizing, neutral, and slightly reducing media, including chlorides.
Titanium's unparalleled qualities of low density (approximately half that of nickel-based alloys), high strength, lightweight nature, and superb corrosion resistance make it an outstanding choice for various demanding chemical environments. Execution standards include: ASTM B338 | ASTM B265 | ASME SB265 | ASTM F67 | ISO 5832-2 | 3.7025 | UNS R50250
Grade 2 Titanium Tube (UNS R50400 / Werkstoff WS 3.7034)
Widely utilized in industrial applications, Grade 2 titanium tube strikes an impressive balance between moderate strength and satisfactory ductility. It boasts excellent corrosion resistance in highly oxidizing and slightly reducing conditions, including chlorides. This grade is indispensable in the chemical and offshore industries, aircraft manufacturing, heat exchangers, hypochlorite systems, fire water systems, ballast water systems, as well as in CPI equipment and various industrial and aerospace components.
Fabrication
Titanium Grade 2 is highly responsive to cold forming using standard techniques. It can be easily machined with a focus on maintaining sharp tools and using ample coolant. Similar to machining austenitic stainless steels, deep and continuous cuts with slow feeds and speeds are essential.
Stock Availability
Daxun Alloys maintains a comprehensive inventory of CP 2 Grade Titanium Seamless and Welded Pipes in various sizes to meet diverse requirements.
Weight Reduction
With a low density and an impressive strength-to-weight ratio, CP 2 grade titanium tubes are ideal for weight-sensitive applications that demand uncompromised strength. They offer excellent cold formability, good ductility, and weldability using conventional TIG and MIG processes, provided inert gas shielding is employed to prevent weld zone embrittlement.
Crystal Structure
At ambient temperatures, ASTM B338 Grade 2 titanium tube exhibits an alpha (hexagonal close-packed) crystal structure, akin to commercially pure titanium grades 1 and 3. Upon reaching approximately 885°C (1625°F), it transitions into a beta (body-centered cubic) structure. This transformation temperature varies based on impurity levels and alloying additions, which also create two distinct temperature zones: the alpha transformation zone (all alpha below) and the beta transformation zone (all beta above). In between, both alpha and beta forms coexist. Typical transformation temperatures for Grade 2 titanium are 890°C (1635°F) and 913°C (1675°F) for alpha and beta, respectively.
Grade 2 Titanium Seamless Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium seamless tubes are meticulously crafted from hollow blanks through hot extrusion or oblique rolling and piercing, followed by multiple cold rolling processes. Titanium seamless tubes must maintain continuous perimeters throughout manufacturing. The comprehensive production process includes: sponge titanium vacuum arc melting, ingot blanking for hollow blanks, cleaning, cutting and feeding, hot extrusion or oblique rolling + piercing, degreasing, drying, cutting, online annealing and straightening, pickling, multiple cold rolling, degreasing, drying, vacuum annealing, straightening, final cutting, pickling, inspection, marking (DAXUN), and packaging.
Grade 2 Titanium Welded Pipe Manufacturing Process
Daxun's ASTM B338 Grade 2 titanium welded pipe is meticulously crafted from annealed flat-rolled steel plate or steel strip using an advanced automatic arc welding (TIG) process. The primary production stages include: titanium plate uncoiling, shearing, butt welding, cleaning, pipe forming, TIG welding, eddy current testing, pre-sizing, annealing, precision reducing and sizing, straightening, eddy current testing, caliper marking, cutting, ultrasonic testing, hydrostatic testing, final inspection, and packaging. Each welded pipe undergoes at least one stress relief heat treatment post forming and welding. Daxun ensures no filler materials are used during the welding process.
Ti-6Al-4V Titanium Pipe - Grade 5 Titanium Tube
Titanium Alloy - (UNS R56400)
Introduction
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 (UNS R56400) is the quintessential titanium alloy, recognized for its duplex alpha+beta composition with aluminum as the alpha stabilizer and vanadium as the beta stabilizer. This formidable alloy exhibits high strength at temperatures up to about 800°F (427°C). ATI Ti-6Al-4V, Grade 5 alloy is ideal for annealing, solution treating, and aging. Its applications are diverse, spanning compressor blades, disks, and rings for jet engines; fuselage and space capsule components; pressure vessels; *** cases; helicopter rotor hubs; fasteners; and critical forgings, all demanding a high strength-to-weight ratio.
The alloy is initially melted using state-of-the-art techniques like vacuum arc (VAR), electron beam (EB), or plasma arc hearth melting (PAM). Remelting is performed in one or two vacuum arc steps to ensure superior quality.
Specifications
• ASTM B338 - Standard for Heat Treatable Titanium Tubes
• AMS 4928 - Specifications for Forgings and Forging Stock (Annealed)
• AMS 4965 - Specifications for Forgings (Solution Treated and Aged)
• AMS 4967 - Specifications for Forgings (Annealed, Heat Treatable)
Physical Properties
Ti-6Al-4V Titanium Tube Melting Range: 2,800-3,000°F (1,538 - 1,649°C)
Density: 0.160 lb/in³; 4.47 g/cm³
Beta Transus Temperature: 1,830°F (± 25°); 999°C (± 14°)
Heat Treatment
Annealed between 1,700-1,900°F (927 - 1,038°C) for optimal hardness, tensile strength, and fatigue strength.
DAXUN 6-4 Grade 5 Titanium Tube offers versatile heat treatment options to meet various requirements.
1. Annealing: 1,275 - 1,400°F (691 - 760°C) for ½ to 2 hours, followed by air or furnace cooling
2. Stress Relief Annealing: 1,000 - 1,200°F (538 - 649°C) for 1 to 8 hours, followed by air or furnace cooling
3. Solution Heat Treating: 1,675 - 1,750°F (913 - 954°C) for 1 hour, followed by water quenching
4. Aging: 975 - 1,025°F (524 - 552°C) for 4 to 8 hours, followed by air cooling
Optimum Properties
Achieving the best properties involves rapid quenching for small cross sections in the solution treated and aged condition. Larger cross-sections and/or delayed quenching may result in suboptimal properties.
Hardness
Typical hardness levels are Rockwell C 30-34 in the annealed condition, and approximately Rockwell C 35-39 in the solution treated and aged condition.
Forgeability/Formability
Introducing the superior DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, meticulously forged at an intense 1,750°F (954°C) and finishing at 1,450°F (788°C). For optimal integrity, a reduction of at least 35% is highly recommended, ensuring remarkable strength and durability.
The exceptional DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube, though challenging to shape at room temperature, reveals its versatility when annealed. Complex forming operations, such as bending and stretching, can be efficiently performed at temperatures up to 1,200°F (649°C), preserving its robust mechanical properties. For precise hot sizing or forming, utilize creep forming within the range of 1,000 to 1,200°F (538 to 649°C).
Machinability
The versatile DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube can be adeptly machined using techniques designed for austenitic stainless steels. Employ slow speeds, high feeds, and ensure robust tool rigidity while generously applying non-chlorinated cutting fluids for optimal results.
Weldability
The DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube demonstrates exceptional weldability, whether in annealed or solution and partially aged conditions, with the aging process occurring during post-weld heat treatment.
Special precautions are necessary to prevent contamination by oxygen, nitrogen, and hydrogen. Fusion welding can be executed in an inert gas-filled chamber or with an inert gas tail shield protecting the molten metal and hot zones. Techniques such as spot welding, seam welding, and flash welding can be performed effectively without a protective atmosphere.
Special Considerations
DAXUN Ti-6Al-4V Titanium Tube, Grade 5 Titanium Tube requires careful handling to avoid hydrogen contamination from improper pickling and absorption of oxygen, nitrogen, and carbon during processes like forging, heat treating, and brazing. Such contamination can negatively impact ductility, notch sensitivity, and formability.
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